Width of doors stairs and escape routes the building regulations approved document b2 fire safety.
Fire staircase door width.
Stair dimensions for straight stairway runs.
Minimum width clear of all obstructions must be 44 inches.
Stairwell width and stair landing platform requirements are summarized by these sketches courtesy carson dunlop associates.
Stair width landing length.
Lwf code of practice for fire safety in the design management and use of.
Nfpa 101 specifies a minimum 11 inch tread and a maximum 78 inch riser for new stairs.
The minimum recommended stair width is between 34 and 36 across the width of the tread.
Section 1910 155 c 3 iv a of this part defines listed and 1910 7 of this part defines a nationally recognized testing laboratory.
Minimum width between handrails on stairs shall be 900mm.
Landings must be at appropriate intervals along a stair or ramp to prevent undue fatigue not exceeding 2500mm between landings.
There is a slight distinction between codes but the ibc states that the stair doors must be capable of being unlocked simultaneously without unlatching upon a signal from the fire command center if present or a signal by.
The stairwell reentry requirements state that stair doors must unlock automatically upon fire alarm.
Doors must not block access or themselves be blocked.
Handrails shall be provided on both sides of accessible stairs and steps including landings.
Protected stair v escape stair.
Width of doors stairs and escape routes.
Stair treads must be wide enough to give good footing.
Each fire door including its frame and hardware must be listed or approved by a nationally recognized testing laboratory.
A door or doorway is the clear width when the door is open see diagram c1.
Firesafe basic means of escape from fire.